Spring Home Maintenance Checklist for Washington Homeowners

Spring’s job on a Washington house is inspection rather than repair. The wet season has just ended, the dry season has not started, and what the winter did is still where the weather left it — the stain, the cracked sealant, the ground that never dried. The maintenance guidance the National Park Service publishes for building exteriors carries a chart of what belongs in spring, and it also sets the order: exterior inspections “proceed from the roof down to the foundation, working on one elevation at a time.”

Two ends of the season decide the timing rather than the month: the rain stops at different dates depending on where the house is, and so does the last freeze. What follows is the spring list in the order that guidance sets it, with what you can settle from the ground and where the work belongs to someone else.

What sets the timing, if not the month

The end of the wet season. WSU Extension describes western Washington as a Mediterranean climate — wet mild winters, dry summers — and states that it is “not uncommon to find very little rainfall from mid-June all the way through the end of September.” East of the Cascades it gives Pullman and Spokane 20 inches a year, with less than an inch in each of June, July and August. Either way, spring is the last stretch in which the winter’s water damage is still visible, and the last stretch before the dry season in which work that needs dry weather can be done.

The end of the freeze risk. The National Centers for Environmental Information publishes an average last-date-of-spring-freeze map built from the 1991–2020 U.S. Climate Normals, showing “the most common date range you can expect to see temperatures dip to 32°F or below for the last time,” and notes that the West is harder to read than the rest of the country because “the changes are much more complex due to elevation and coastal influences.” One forecast office puts numbers on that spread: the National Weather Service office in Spokane reports that last freeze dates in its region typically range “from early April near Lewiston and Wenatchee to early June from Republic to Usk” — roughly two months between the earliest and latest places it serves. The systems that hold water have their own preparation page.

The season’s own hazards. The same office’s spring 2025 outlook states that “strong winds and flooding are top concerns for this time of the year” — the season when snowmelt and rain arrive together.

The whole-home maintenance calendar places this season among the others.

What the maintenance chart schedules for spring

The Park Service’s Preservation Brief 47 was written for the owners of small and medium-size historic buildings, and its chart carries a caveat: the intervals are suggested “based on a temperate four-season climate and moderate levels of annual rainfall,” and where conditions are more extreme “the frequency of inspections should be altered accordingly.” Washington’s wet side sits inside that description; a house at elevation or under heavy canopy may warrant more. The spring column:

One rule overrides the schedule: “All building features should be inspected after any significant weather event such as a severe rainstorm or unusually high winds.”

The checklist, from the roof down

1. The roof line and its drainage

Observe the roof system from where the brief says it is safe: “The functioning of gutters and downspouts can be safely observed from the ground during rainy weather and when winter ice has collected.” Grade-level observation sits between close-up inspections by an experienced roofer, not in place of them.

What the wet season left is what the checks are for. A county surface-water programme’s list is short: check the system “for leaks, damaged parts, rust, and evidence of past erosion,” including the hidden outlets under decks and staircases that get forgotten; keep trees and vines trimmed back for a 24-inch clearance; clean screens regularly to reduce debris build-up. Where a gutter is full while its downspout runs dry, that is diagnosis rather than cleaning, and the overflow page takes it from there alongside the outlet checks. How often the roof line needs clearing is decided by what stands over it, and that is its own question. None of it is ladder work: what a roof that looks sound from the driveway can still be doing, and where the job belongs to a professional, is in the roof-care guide. Where the winter left ice, that is a diagnosis too.

2. Walls, porches, windows and entryways

The chart puts the wall, window and entryway inspections in spring, ahead of the summer and fall painting season, and that is why the season matters: what the wet winter did to a finish shows now, with time to act before the next one. The brief’s method is one elevation at a time, in both weathers — “It is best to inspect walls during dry as well as wet weather” — looking for “movement in cracks, joints, and around windows and doors” and asking whether it is seasonal movement or an ongoing problem.

The joints are where water gets in. Sealants “have a limited life and require careful inspection and periodic replacement,” so they are examined routinely rather than when a stain appears. What is growing on the wall is a separate question, and how often the house needs washing before it is painted is another.

3. The foundation and the downspouts, inspected together

The brief ties two inspections into one: “Inspections at the foundation should be done in conjunction with the inspection of the downspouts to ensure that water is being discharged a sufficient distance from the building perimeter to avoid excessive dampness in basements or crawl spaces.”

The Environmental Protection Agency’s prevention guidance states the rule the inspection is looking for — “Don’t let foundations stay wet. Provide drainage and slope the ground away from the foundation” — and its instruction for water that has already arrived: stop seepage into a crawl space or basement quickly, considering measures such as a sump pump or regrading, and dry anything that got wet completely within 48 hours. Water standing at the foundation in the next rain is its own diagnosis: watch a storm, note where it stands, and photograph it.

4. The places the wet season reached that nobody dried

The EPA’s warning is that the water that causes trouble sits where nobody looked: “Behind walls. Ceilings. Crawl spaces. Attics.” Its signs of water damage belong on the walk — rippling wall coverings, cracked drywall tape, peeling paint — and its instruction is that wet areas be dried completely within 48 hours.

This is also where the checklist stops. An attic is a place to look into; a crawl space is not a place for a homeowner to enter and work in, and any electrical, gas, structural or abatement question goes to a licensed trade. Air that stays damp indoors with no visible leak is a different diagnosis.

5. The yard, the trees and the debris

The Insurance Institute for Business & Home Safety asks homeowners to prepare “ahead of spring severe weather” rather than after it, and its tree advice is the one to act on: “Have trees around the home trimmed by an arborist. Remove branches that overhang the house and dead, dying or diseased trees.”

WSU Extension’s fire-resistant landscaping chapter treats maintenance as part of the system rather than a chore: plants allowed to grow unchecked “can become fire hazards,” its table is “an approximation of the frequency of maintenance necessary,” and the practices need doing at least annually, some more often, because “each home and geographic region has differing needs, timings, and frequencies of maintenance.” One item is dated: avoid pruning conifers such as pine, spruce and Douglas-fir from April through October, when the adult pitch moth is laying eggs and is drawn to fresh pruning wounds.

The debris goes somewhere, and burning is not it: under the Department of Natural Resources’ rules, material “growing in and/or gathered from improved property, such as yard and garden debris, cannot be burned under DNR regulations” at all, and where burning is permitted the pile size from October 16 through June 30 is ten feet in most counties but four feet in Island, King, Kitsap, Mason, Pierce, San Juan and Spokane. The Department of Ecology names the alternatives — compost bin, curbside yard-waste container, yard-debris drop-off site — and states that dumping yard waste into state waters or a storm drain is illegal and can draw fines from the agency or the local jurisdiction.

6. Where the work stops

• Anything on the roof surface or at the roof edge.
• Ladder work above a safe reach, and anything within reach of an overhead service drop.
• Limbing or felling trees and branches above head height. That is the arborist’s job.
• Electrical, gas, refrigerant and structural work.
• Entering a crawl space to work, and any other confined space.
• Mixing cleaning chemicals, and treating growth you have not identified.

7. Write down what the winter did

The brief treats the record as part of the system rather than as paperwork: deficient conditions are “placed on a written schedule to be corrected or monitored,” a visual record can be kept alongside them, and the benefits it claims for regular inspection and seasonal work include “keeping a written record of completed work.” One line per finding is enough — what you saw, where, and what happened to it. Two springs of notes tell you which elevation leaks first and whether a repair held.

The next step

Walk the house once in the next rain and once on a dry day, in the order the chart sets: the roof line first, then the walls and openings, then the foundation with the downspouts, then the places the water reached that nobody dried. Date every note, and let the last freeze date, rather than the month, say when the season’s freeze-sensitive work is finished.